CN115183530A

CN115183530A - Freezing tank, quick freezing equipment and control method

Info

Publication number: CN115183530A
Application number: CN202210795466.XA
Authority: CN
Inventors: 吴令辉; 刘恩峰
Original assignee: Hunan Yiyuan Biotechnology Co ltd
Current assignee: Hunan Yiyuan Biotechnology Co ltd
Priority date: 2022-07-07
Filing date: 2022-07-07
Publication date: 2022-10-14

Abstract

The invention belongs to the technical field of low-temperature quick freezing, and particularly relates to a freezing tank, quick freezing equipment and a control method, wherein the freezing tank comprises a freezing outer tank, a freezing inner tank, a conveying mechanism, a pressing plate and a lifting mechanism; the freezing inner groove is arranged in the cold outer groove, the conveying mechanism is connected with the freezing inner groove, the pressing plate covers the freezing inner groove, the to-be-frozen product passes through the space between the pressing plate and the conveying mechanism, and the pressing plate completely presses the to-be-frozen product into the freezing liquid; the lifting mechanism is used for adjusting the height of the freezing inner groove so as to correspondingly change the height of a passage between the pressing plate and the conveying mechanism; the quick-freezing equipment comprises the freezing tank and the refrigerating assembly, the freezing tank of the quick-freezing equipment can enable the article to be frozen to completely invade refrigerating fluid, the article to be frozen can be quickly frozen without turning, the freezing time is shortened, the production efficiency is improved, the production cost is reduced, the controller is in communication connection with the refrigerator, the water pump, the liquid level sensor and the temperature sensor in the control method, and automatic operation can be achieved.

Description

Freezing tank, quick freezing equipment and control method

Technical Field

The invention belongs to the technical field of low-temperature quick freezing, and particularly relates to a freezing tank, quick freezing equipment and a control method.

Background

The food freezing technology and the freezing equipment are widely applied to the production, transportation and storage processes of perishable foods such as meat, poultry, aquatic products, milk, eggs, vegetables, fruits and the like, the frozen foods have better nutrition preservation, convenient use and taking, difficult deterioration, sanitation and economy, and the food freezing mode comprises low-temperature air freezing, freezing liquid spraying and freezing liquid immersion. In order to keep the original nutrition and flavor of food as much as possible, the freezing time of food is shortened by spraying and immersing the freezing liquid.

At present, the quick-freezing equipment mostly sprays refrigerating fluid (including liquid nitrogen, liquid carbon dioxide and the like) on food, because of cost reasons, only be applicable to high-value food, some quick-freezing equipment also adopt low temperature refrigerating fluid to immerse food into it, but have food come-up and can not submerge completely, cause the uneven condition of freezing, influence and freeze the article quality, need prolong the freezing time or turn food in order to solve this problem often, can reduce production efficiency and improve manufacturing cost.

Disclosure of Invention

The invention provides a freezing tank, a quick-freezing device and a control method, which can completely immerse food in freezing liquid without turning the food, improve the production efficiency, reduce the cost and solve at least one problem in the background art.

Based on the above purpose, the invention provides quick-freezing equipment, which comprises:

freezing the outer tank;

an inner freezing tank arranged in the outer cold tank and used for containing freezing liquid;

the conveying mechanism is connected with the freezing inner tank, part of the conveying mechanism is arranged in the freezing inner tank, and the other part of the conveying mechanism obliquely protrudes out of the freezing inner tank;

the pressing plate covers the upper part of the inner freezing groove, is connected with the outer freezing groove, forms a passage for the to-be-frozen product to pass through between the pressing plate and the conveying mechanism, and completely presses the to-be-frozen product into the freezing liquid by the pressing plate;

and the lifting mechanism is used for adjusting the distance between the inner bottom surface of the inner freezing tank and the bottom of the conveying mechanism so as to correspondingly change the height of a passage between the pressing plate and the conveying mechanism.

Optionally, the conveying mechanism comprises a timing belt, a conveying belt and a baffle; the hold-in range is connected with the conveyer belt, the hold-in range drives the conveyer belt operation under the drive of gear, and a plurality of baffles distribute along the conveyer belt, baffle and conveyer belt and/or hold-in range fixed connection.

Optionally, the baffle defines a plurality of flow openings, each flow opening being adjacent to a surface of the conveyor belt.

Optionally, the lifting mechanism comprises a driving motor, at least one lifting assembly and a screw rod; the output end of the driving motor is in driving connection with the lead screw, the lead screw is in threaded connection with the lifting assembly, and the driving motor rotates the lead screw to drive the lifting assembly to enable the inner freezing groove to ascend or descend.

Optionally, the lift assembly comprises a base plate, a support arm, and a top plate; the two bottom plates are in threaded connection with the screw rod, and the thread rotating directions of the two bottom plates are opposite; one end of each of the two supporting arms is hinged with the two bottom plates, the other end of each supporting arm is hinged with a top plate, and the top plates are abutted to the bottoms of the freezing inner grooves.

Optionally, a plurality of rolling rollers are arranged on one side of the pressure plate close to the conveying mechanism.

Optionally, a plurality of connecting pieces are arranged on two inner sides of the freezing outer groove, and each connecting piece is connected with the freezing inner groove and the pressing plate through bolts and nuts.

Optionally, the freezing tank further comprises a set of top covers covering the top of the freezing outer tank.

The utility model provides a quick-freeze equipment, includes as above freezing groove and refrigeration subassembly, the refrigeration subassembly includes refrigerator, water pump and with the drain pipe and the feed liquor pipe of freezing inside groove intercommunication, the water pump carries the cryogenic fluid to flow through drain pipe and feed liquor pipe and is used for the cryogenic fluid in the freezing inside groove of circulation and carries out the heat exchange with the refrigerator, the water inlet and the delivery port of water pump are respectively through two tee joints and feed liquor pipe intercommunication, and two tee joints have the storage tank through two connecting pipe intercommunications respectively, the feed liquor pipe and the connecting pipe at water pump both ends are equipped with the valve respectively.

A control method of quick-freezing equipment comprises a controller, a liquid level sensor and a temperature sensor, wherein the controller is in communication connection with a refrigerator, a water pump, the liquid level sensor and the temperature sensor, and the liquid level sensor and the temperature sensor are arranged in a freezing inner tank and are respectively used for detecting the liquid level and the temperature of freezing liquid; in the production process, the water pump continuously operates, the temperature sensor detects the temperature of refrigerating fluid and transmits a signal to the controller, and when the temperature exceeds a set temperature, the controller controls the refrigerating machine to reduce the refrigerating power; when refrigerating fluid needs to be added into the inner freezing tank, the controller sends an instruction to close a valve on the liquid inlet pipe close to a water inlet of the water pump and a valve on the connecting pipe close to a water outlet of the water pump, and other valves are opened to extract the refrigerating fluid from the storage tank; when the freezing liquid in the freezing inner groove needs to be partially or completely taken out, the controller sends an instruction to close the valves close to the water outlet of the water pump on the liquid inlet pipe and the connecting pipe, and the liquid level sensor feeds the liquid level back to the controller to be used as a subsequent instruction.

The invention has the beneficial effects that: according to the freezing tank provided by the invention, the inner freezing tank is filled with low-temperature refrigerating fluid, the conveying mechanism conveys the to-be-frozen product to pass through the low-temperature refrigerating fluid, a channel for the to-be-frozen product to pass through is formed between the pressing plate and the conveying mechanism, the to-be-frozen product is completely pressed into the refrigerating fluid by the pressing plate, and food does not need to be turned again, so that all parts of the to-be-frozen product can be relatively uniformly and rapidly frozen, meanwhile, the freezing time is shortened, the production efficiency is improved, the production cost is reduced, and the frozen product can also retain more nutrition and the original flavor by shortening the freezing time; the conveying mechanism is provided with a part of inclined and protruded freezing inner grooves and is used for draining freezing liquid on frozen products and conveying the frozen products out for subsequent operation; the passage height between the pressing plate and the conveying mechanism is adjusted through the lifting mechanism, the freezing of the articles to be frozen with different sizes can be met, and the application range of the freezing tank is enlarged.

The freezing tank of the quick-freezing equipment can ensure that the articles to be frozen completely invade into the freezing liquid, and the articles to be frozen can be quickly frozen without turning, so that the freezing time is shortened, the production efficiency is improved, and the production cost is reduced.

The control method can realize automatic operation and reduce manual labor.

Drawings

FIG. 1 is a schematic structural diagram of a quick-freezing device provided by an embodiment of the invention;

FIG. 2 is an enlarged view of area A of FIG. 1;

FIG. 3 is a top view of the quick-freezing equipment provided by the embodiment of the invention;

FIG. 4 is a schematic structural diagram of a freezing tank provided in an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a platen according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a lifting mechanism according to an embodiment of the present invention;

fig. 7 is a schematic diagram illustrating a control method according to an embodiment of the present invention.

In the figure: 10. a freezing tank; 11. freezing the outer tank; 12. an inner freezing tank; 13. a transport mechanism; 131. a synchronous belt; 132. a conveyor belt; 133. a baffle plate; 134. a flow port; 135. a gear; 14. a top cover; 15. pressing a plate; 151. a rolling roller; 16. a connecting member; 20. a refrigeration assembly; 21. a liquid outlet pipe; 22. a liquid inlet pipe; 23. a water pump; 24. a valve; 25. a storage tank; 26. a connecting pipe; 30. a lifting mechanism; 31. a drive motor; 32. a lifting assembly; 321. a base plate; 322. a support arm; 323. a top plate; 33. and a screw rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.

As shown in fig. 1 to 6, the present invention provides a freezing tank comprising: a freezing outer tank 11, a freezing inner tank 12, a conveying mechanism 13, a pressure plate 15 and a lifting mechanism 30; wherein, the inner freezing groove 12 is arranged in the outer cold groove, and the inner freezing groove 12 is used for containing freezing liquid; the conveying mechanism 13 is connected with the freezing inner tank 12, part of the conveying mechanism 13 is arranged in the freezing inner tank 12, and the other part of the conveying mechanism obliquely protrudes out of the freezing inner tank 12; the pressing plate 15 covers the upper part of the freezing inner tank 12, the pressing plate 15 is connected with the freezing outer tank 11, the connection position can be adjusted up and down, a passage for the to-be-frozen product to pass through is formed between the pressing plate 15 and the conveying mechanism 13, and the to-be-frozen product is completely pressed into the refrigerating fluid by the pressing plate 15; the lifting mechanism 30 is used for adjusting the distance between the inner bottom surface of the freezing inner tank 12 and the bottom of the conveying mechanism 13, so that the channel height between the pressing plate 15 and the conveying mechanism 13 is correspondingly changed.

Compared with the prior art, in the freezing tank 10 provided by the embodiment of the invention, the inner freezing tank 12 is filled with low-temperature freezing liquid, the conveying mechanism 13 conveys the to-be-frozen products to pass through the low-temperature freezing liquid, a passage for the to-be-frozen products to pass through is formed between the pressing plate 15 and the conveying mechanism 13, the pressing plate 15 completely presses the to-be-frozen products into the freezing liquid, and food does not need to be turned over again to ensure that all parts of the to-be-frozen products can be relatively uniformly and rapidly frozen, meanwhile, the freezing time is shortened, the production efficiency is improved, the production cost is reduced, and the frozen products can also retain more nutrition and the original flavor by shortening the freezing time; the conveying mechanism 13 is provided with a part of inclined protruding freezing inner grooves 12 and is used for spraying freezing liquid on frozen products and conveying the frozen products out for subsequent operation; the channel height between the pressure plate 15 and the conveying mechanism 13 is adjusted through the lifting mechanism 30, so that the freezing of the products to be frozen with different sizes can be met, and the application range of the freezing tank 10 is widened.

In addition, the inner freezing tank 12 is arranged in the outer freezing tank 11, which helps to reduce the absorption of external heat by the freezing liquid and simultaneously can prevent the freezing liquid from splashing to the ground during production.

In this embodiment, the conveying mechanism 13 includes a timing belt 131, a conveying belt 132, and a flapper 133; the synchronous belt 131 is connected to the conveyor belt 132, the synchronous belt 131 drives the conveyor belt 132 to rotate under the driving of the gear 135, the plurality of baffles 133 are distributed along the conveyor belt 132, and the baffles 133 are fixedly connected to the conveyor belt 132 and/or the synchronous belt 131. Through the above arrangement, the gear 135 rotates at a certain speed under the action of external driving force to drive the synchronous belt 131 meshed therewith, the conveyor belt 132 rotates simultaneously with the synchronous belt 131, the product to be frozen is conveyed from one end of the freezing inner tank 12 to the other end, and the conveying mechanism 13 partially slantly protrudes out of the freezing inner tank 12, so that a corner exists, the synchronous belt 131 can be meshed with the gear 135 at the corner, and the synchronous belt 131 is lightly pressed by the roller to form the corner without influencing the operation of the synchronous belt, so that the conveyor belt 132 can form a corresponding corner, and the conveyor belt 132 can be prevented from slipping.

Specifically, the conveying mechanism 13 has a frame with a certain corner, a plurality of roller shafts are uniformly arranged along the frame, gears 135 are coaxially and fixedly connected to two ends of the roller shafts at the two ends and the corner, two synchronous belts 131 are respectively engaged with the gears 135 at two sides of the roller shafts, the conveying belt 132 is fixedly connected between the two synchronous belts 131 and is in rolling connection with the roller shafts, the gear 135 located above the freezing inner groove 12 is in centering transmission connection with an external driving device, food may be adhered to the conveying belt 132 and is not easy to separate in the freezing process, and the arc parts at the corner and the upper end of the conveying belt 132 can enable the food to be easily separated from the conveying belt 132 after being frozen.

In one embodiment, referring to fig. 2, the baffle 133 is provided with a plurality of circulation openings 134, each circulation opening 134 is close to the surface of the conveyor belt 132, so that the circulation openings 134 and the surface of the conveyor belt 132 form through holes for passing the freezing liquid, the frozen product is conveyed to the inclined position of the conveying mechanism 13, and the poured freezing liquid can smoothly flow back to the inner freezing tank 12 from the circulation openings 134; meanwhile, most of the conventional conveyor belts 132 for freezing food are made of reticular metal materials to ensure that the freezing liquid can smoothly pass through, but the frozen products are easy to adhere to the conveyor belts, and the conveyor belts 132 can be made of rubber, so that the surfaces of the conveyor belts 132 are as smooth as possible, and the adhesion of the frozen products can be reduced; the rubber can be any one of silicon rubber, butadiene rubber and fluororubber, the rubber can keep flexibility in an environment of-70 ℃, and the freezing temperature of the refrigerating fluid is-30 ℃ to-65 ℃ at the lowest.

In this embodiment, referring to fig. 3 and fig. 6, the lifting mechanism 30 includes a driving motor 31, at least one lifting assembly 32, and a screw 33; the output of driving motor 31 is connected with lead screw 33 drive, lead screw 33 and lifting unit 32 threaded connection, driving motor 31 rotates lead screw 33 and drives lifting unit 32 and make freezing inside groove 12 rise or descend, so, when the passageway height between clamp plate 15 and the transport mechanism 13 needs to change, start driving motor 31 and rotate certain number of turns with certain rotational speed and can adjust corresponding height, driving motor 31 is gear motor, the passageway height between can comparatively accurate adjusting plate 15 and the transport mechanism 13, driving motor 31 sets up in the outside one end of freezing outside groove 11, compare in setting up in freezing outside groove 11, can avoid low temperature to cause the influence to driving motor 31's life, and maintain more swiftly.

Further, the lifting assembly 32 includes a bottom plate 321, a support arm 322, and a top plate 323; wherein, the two bottom plates 321 are in threaded connection with the screw rod 33, and the thread rotating directions of the two bottom plates 321 are opposite; one end of each of the two supporting arms 322 is hinged with the two bottom plates 321, the other end of each of the two supporting arms is hinged with a top plate 323, and the top plate 323 abuts against the bottom of the inner freezing groove 12, so that when the height of a passage between the pressing plate 15 and the conveying mechanism 13 needs to be increased, the joint of the inner freezing groove 12 and the outer freezing groove 11 is firstly loosened, then the driving motor 31 rotates the screw rod 33 to rotate towards one direction, the distance between the two bottom plates 321 is increased, the two supporting arms 322 are opened to reduce the height of the top plate 323, and finally the inner freezing groove 12 and the conveying mechanism 13 fixedly connected with the inner freezing groove 12 are reduced in height, so that the purpose of increasing the height of the passage between the pressing plate 15 and the conveying mechanism 13 is achieved; the driving motor 31 is rotated reversely to reduce the distance between the two bottom plates 321, the two supporting arms 322 are closed, the height of the top plate 323 is raised, and the height of the passage between the pressing plate 15 and the conveying mechanism 13 is reduced.

In this embodiment, a plurality of rolling rollers 151 are disposed on one side of the pressing plate 15 close to the conveying mechanism 13, so that the to-be-frozen product is in rolling connection with the pressing plate 15, and the resistance of the pressing plate 15 to the to-be-frozen product is reduced, so that the to-be-frozen product can pass through the pressing plate more smoothly.

In one embodiment, a plurality of connecting members 16 are arranged on both inner sides of the freezing outer tank 11, each connecting member 16 is connected with the freezing inner tank 12 and the pressing plate 15 through bolts and nuts, specifically, the bolt for fixing the freezing inner tank 12 is a longer bolt, which can meet the requirement of adjusting the height of the freezing inner tank 12, and only the nut connected with the freezing tank 10 needs to be loosened before adjustment.

In one embodiment, the freezing tank 10 further includes a set of top covers 14 covering the top of the freezing outer tank 11 for blocking the refrigerant fluid from absorbing heat from the external environment, so as to facilitate the refrigerant fluid to keep low temperature, and the top covers 14 may be hinged to the freezing outer tank 11.

In this embodiment, the outer freezing tank 11, the inner freezing tank 12 and the cover plate are all provided with insulating layers.

A quick-freezing device is used for, but not limited to, quick-freezing and fresh-keeping of food and comprises a freezing tank 10 and a refrigerating assembly 20, wherein the refrigerating assembly 20 comprises a refrigerator, a water pump 23, a liquid outlet pipe 21 and a liquid inlet pipe 22 which are communicated with a freezing inner tank 12, the water pump 23 is used for conveying refrigerating fluid to flow through the liquid outlet pipe 21 and the liquid inlet pipe 22 and circulating the refrigerating fluid in the freezing inner tank 12 and exchanging heat with the refrigerator, a water inlet and a water outlet of the water pump 23 are respectively communicated with the liquid inlet pipe 22 through two tee joints, the two tee joints are respectively communicated with a storage tank 25 through two connecting pipes 26, the liquid inlet pipe 22 and the connecting pipes 26 at two ends of the water pump 23 are respectively provided with a valve 24, and the valve 24 is an electromagnetic valve. The freezing tank 10 of the quick-freezing equipment can ensure that the articles to be frozen completely invade the refrigerating fluid, and the articles to be frozen can be quickly frozen without turning, thereby shortening the freezing time, improving the production efficiency and reducing the production cost.

A control method of quick-freezing equipment comprises a controller, a liquid level sensor and a temperature sensor, wherein the controller is in communication connection with a refrigerator, a water pump 23, the liquid level sensor and the temperature sensor, and the liquid level sensor and the temperature sensor are arranged in a freezing inner tank 12 and are respectively used for monitoring the liquid level and the temperature of freezing liquid; in the production process, the water pump 23 continuously operates, the temperature sensor detects the temperature of the refrigerating fluid, a signal is transmitted to the controller, and when the temperature exceeds the set temperature, the controller controls the refrigerating machine to reduce the refrigerating power; when refrigerating fluid needs to be added into the inner refrigerating groove 12, the controller sends an instruction to close the valve 24 on the liquid inlet pipe 22 close to the water inlet of the water pump 23 and the valve 24 on the connecting pipe 26 close to the water outlet of the water pump 23, and other valves 24 are opened, namely, the refrigerating fluid is extracted from the storage tank 25, when the liquid level sensor detects that the liquid level reaches a set value, the controller sends an instruction to open the valve 24 on the liquid inlet pipe 22 close to the water inlet of the water pump 23 and the valve 24 on the connecting pipe 26 close to the water outlet of the water pump 23, and other valves 24 are closed, and the refrigerating fluid is stopped being extracted from the storage tank 25; when the freezing liquid in the freezing inside groove 12 needs to be taken out partially or completely, the controller sends out an instruction to close the valve 24 close to the water outlet of the water pump 23 on the liquid inlet pipe 22 and the connecting pipe 26, the liquid level sensor feeds back the liquid level to the controller, a follow-up instruction is to be made, and the follow-up operation comprises: the water pump 23 and the refrigerator are shut off, the production is stopped, and the two valves 24 on the connecting pipe 26 are closed and the two valves 24 on the liquid inlet pipe 22 are opened without shutting off the water pump 23 and the refrigerator, so that the production is continued.

When freezing larger articles to be frozen, the height of the inner freezing groove 12 needs to be reduced, and then the inner freezing groove 12 needs to be supplemented with refrigerating fluid; when the frozen product to be frozen is small, the height of the inner freezing tank 12 needs to be increased, and a part of the frozen liquid in the inner freezing tank 12 needs to be extracted. The control method can realize automatic operation and reduce manual labor.

Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to imply that the scope of the application is limited to these examples; within the context of the present application, features from the above embodiments or from different embodiments may also be combined, steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments in the present application as described above, which are not provided in detail for the sake of brevity.

It is intended that the one or more embodiments of the present application cover all such alternatives, modifications, and variations as fall within the broad scope of the present application. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of one or more embodiments of the present application are intended to be included within the scope of the present application.

Claims

1. A freezing tank, comprising:

a freezing outer tank (11);

an inner freezing tank (12) arranged in the outer cold tank, wherein the inner freezing tank (12) is used for containing freezing liquid;

a conveying mechanism (13) connected with the freezing inner tank (12), wherein one part of the conveying mechanism (13) is arranged in the freezing inner tank (12), and the other part of the conveying mechanism (13) obliquely protrudes out of the freezing inner tank (12);

the pressing plate (15) covers the upper part of the inner freezing groove (12), the pressing plate (15) is connected with the outer freezing groove (11), a passage for the to-be-frozen product to pass through is formed between the pressing plate (15) and the conveying mechanism (13), and the to-be-frozen product is completely pressed into the freezing liquid by the pressing plate (15);

and the lifting mechanism (30) is used for adjusting the distance between the inner bottom surface of the inner freezing tank (12) and the bottom of the conveying mechanism (13) so as to correspondingly change the channel height between the pressing plate (15) and the conveying mechanism (13).

2. A freezing tank according to claim 1, wherein the conveying mechanism (13) comprises a timing belt (131), a conveying belt (132) and a baffle (133); hold-in range (131) are connected with conveyer belt (132), hold-in range (131) drive conveyer belt (132) operation under the drive of gear (135), and a plurality of baffles (133) distribute along conveyer belt (132), baffle (133) and conveyer belt (132) and/or hold-in range (131) fixed connection.

3. A freezing tank according to claim 2, wherein the baffle (133) is provided with a plurality of through-openings (134), each through-opening (134) being adjacent to a surface of the conveyor belt (132).

4. A freezing tank according to claim 1, wherein the lifting mechanism (30) comprises a drive motor (31), at least one lifting assembly (32) and a lead screw (33); the output end of the driving motor (31) is in driving connection with the screw rod (33), the screw rod (33) is in threaded connection with the lifting assembly (32), and the driving motor (31) rotates the screw rod (33) to drive the lifting assembly (32) to enable the inner freezing tank (12) to ascend or descend.

5. A freezing tank according to claim 4, wherein the lifting assembly (32) comprises a bottom plate (321), a support arm (322) and a top plate (323); the two bottom plates (321) are in threaded connection with the screw rod (33), and the threaded rotating directions of the two bottom plates (321) are opposite; one end of each of the two supporting arms (322) is hinged with the two bottom plates (321) respectively, the other end of each of the two supporting arms is hinged with one top plate (323), and the top plate (323) abuts against the bottom of the inner freezing tank (12).

6. Freezer trough according to claim 1, characterized in that the pressure plate (15) is arranged with several rolling rollers (151) on the side close to the transport mechanism (13).

7. A freezing tank according to claim 1, wherein a plurality of connecting pieces (16) are provided on both inner sides of the freezing outer tank (11), and each connecting piece (16) is connected with the freezing inner tank (12) and the pressure plate (15) by bolts and nuts.

8. A freezing tank according to claim 1, further comprising a set of top covers (14) covering the top of the freezing outer tank (11).

9. A quick-freezing apparatus, characterized by comprising a freezing tank (10) and a refrigerating assembly (20) as claimed in any one of claims 1 to 8, wherein the refrigerating assembly (20) comprises a refrigerator, a water pump (23), and a liquid outlet pipe (21) and a liquid inlet pipe (22) which are communicated with the freezing inner tank (12), the water pump (23) is used for conveying refrigerating liquid to flow through the liquid outlet pipe (21) and the liquid inlet pipe (22) for circulating the refrigerating liquid in the freezing inner tank (12) and carrying out heat exchange with the refrigerator, a water inlet and a water outlet of the water pump (23) are respectively communicated with the liquid inlet pipe (22) through two tee joints, the two tee joints are respectively communicated with a storage tank (25) through two connecting pipes (26), and the liquid inlet pipe (22) and the connecting pipes (26) at two ends of the water pump (23) are respectively provided with a valve (24).

10. The control method of the quick-freezing equipment according to claim 9, characterized by comprising a controller, a liquid level sensor and a temperature sensor, wherein the controller is in communication connection with a refrigerator, a water pump (23), the liquid level sensor and the temperature sensor, and the liquid level sensor and the temperature sensor are arranged in the freezing inner tank (12) and are respectively used for detecting the liquid level and the temperature of the freezing liquid; in the production process, the water pump (23) continuously operates, the temperature sensor detects the temperature of the refrigerating fluid and transmits a signal to the controller, and when the temperature exceeds the set temperature, the controller controls the refrigerating machine to reduce the refrigerating power; when refrigerating fluid needs to be added into the inner freezing tank (12), the controller sends an instruction to close a valve (24) on the liquid inlet pipe (22) close to a water inlet of the water pump (23) and a valve (24) on the connecting pipe (26) close to a water outlet of the water pump (23), other valves (24) are opened, namely the refrigerating fluid is extracted from the storage tank (25), when the liquid level sensor detects that the liquid level reaches a set value, the controller sends an instruction to open the valve (24) on the liquid inlet pipe (22) close to the water inlet of the water pump (23) and the valve (24) on the connecting pipe (26) close to the water outlet of the water pump (23), other valves (24) are closed, and the refrigerating fluid is stopped being extracted from the storage tank (25); when the freezing liquid in the inner freezing groove (12) needs to be partially or completely taken out, the controller sends an instruction to close the valve (24) on the liquid inlet pipe (22) and the connecting pipe (26) close to the water outlet of the water pump (23), and the liquid level sensor feeds the liquid level back to the controller to be used for making a subsequent instruction.